[gcr] configrue: Bump GTK dependency to 3.10

[Stefan Walter <stefw src gnome org>]

commit 2553c3f98720ae03ff51e1ea7d716f3029f4a302
Author: Stef Walter <stefw redhat com>
Date:   Sat Sep 13 08:14:48 2014 +0200

    configrue: Bump GTK dependency to 3.10

 configure.ac |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 68bcf96..bb1f0c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,8 @@ GLIB_MAX=GLIB_VERSION_2_38
 
 GCRYPT_VERSION=1.4.5
 
+GTK_REQ=3.10
+
 dnl ****************************************************************************
 dnl Library package and libtool versioning
 dnl
@@ -114,7 +116,7 @@ AC_ARG_WITH(gtk, [
 AM_CONDITIONAL(WITH_GTK, test "$with_gtk" != "no")
 
 if test "x$with_gtk" != "xno"; then
-       PKG_CHECK_MODULES(GTK, gtk+-3.0 >= 3.0)
+       PKG_CHECK_MODULES(GTK, gtk+-3.0 >= $GTK_REQ)
        AC_SUBST(GTK_CFLAGS)
        AC_SUBST(GTK_LIBS)
 fi